Rearrange dataframe to fit longitudinal model in R...

Adding rows to make a full long dataset for longitudinal data analysis...

How to add new variable with condition in longitudinal data in R...

How to get the first occurance of a character in R...

Assistance with reshaping intensive longitudinal data in R...

Conditional subset based on one occurrence...

Repeat measures: how to use initial measurements to estimate subsequent measurement based off time d...

counting occurrence between observations...

(Longitudinal data) Create new variable with last value for each ID...

Longitudinal data: Trying to establish if the subjects have a followup visit...

how to manipulated data set into new data frame?...

How to calculate number and duration of categorical spells by ID in R...

Median number of observations per person...

Variable screening continuous outcomes, categorical predictor, negative p-values...

How to aggregate data within two grouping variables (group in group)?...

Select rows with all longitudinal measurements...

Plot predicted values from lmer longitudinal analysis...

How to do a marginal model analysis in R?...

How to calculate regression residuals in R for each individual in a longitudinal analysis?...

Keep first record when event occurrs...

SAS dynamic arrays with changing start and stop values...

Can group by and tidy be used to fit multilevel models (lme) to repeated measures/longitudinal data?...

lagging a variable taking into account year and id...

How to count subjects on a longitudinal patient study in R?...

Creating an empty longitudinal country dataset...

estimate a repeated measures random effects model with a nested structure using `plm()`...

Creating a starting value variable with longitudinal data (conditional)...

Dark to light colours based on value ggplot2...

Calculate largest value for multiple overlapping events in a specific range...

How can I calculate the difference between two last values in R?...